Use the new conda package format

[hoxbro]

It seems logical to use the new format for conda packaging; it should be faster, which can't hurt.

https://conda.io/projects/conda-build/en/latest/resources/package-spec.html

[maximlt]

Didn't get a chance to post my review but this was briefly discussed live yesterday. It's fine it got merged but I wouldn't push for migrating all the HoloViz pyviz packages to this format until .tar.bz2 is deprecated, as inspecting a .conda file is cumbersome (un-archive the whole thing and then un-archive the two .tar.zst files it contains).

[hoxbro]

It isn't that cumbersome. It only takes a couple of seconds to do the extra step. And (good) archive managers can look inside nested archives.

But I won't push it for other packages. I will let that be up to the lead maintainers of the respective project.

[maximlt]

It isn't that cumbersome. It only takes a couple of seconds to do the extra step. And (good) archive managers can look inside nested archives.

For you maybe. I tried on Windows and the default archive manager wouldn't work. Tried on Mac too and after extracting the first archive, somehow extracting .tar.zst created a .tar.zst.cpgz.

[hoxbro]

That's what I meant by good.

I don't think any people will unpack the conda package by themselves, and if they do, they will know how to do it.

[philippjfr]

Inspecting a package seems like a pretty niche use case, reserved primarily to developers, i.e. us, so I'd also argue it's not a big deal.